Roller Thrust Bearing Washer Bore Diameter 2 1/2 in Compatible Bearing 4052 For Thrust Bearing Type Needle Roller Lubrication Type Lubrication Required Maximum Temperature 250 Degrees F Minimum Temperature -5 Degrees F Outside Diameter 3 1/4 in Self Lubricating Bearing No System of Measurement Inch Washer Thickness 1/8 in Maximum PV Not Applicable Series TRD TWD Washer Material Alloy Steel Washer Material Grade 52100